Drag / one fingerRotate (horizontal) & tilt (vertical)
Two-finger scrollPan (up/down, left/right)
Mouse wheel / pinchZoom
Click a nodeSelect & trace lineage (parents = amber, children = cyan)
Search (top right)Jump to a language
Legend chips (bottom)Filter by paradigm (⌘/Shift to toggle individually)
Controls (above legend)Flip time axis · auto-rotate · time drift · center-on-click
EscClose selection & restore the previous view
Height = year · color = paradigm · lines = influence. When left idle, the view slowly drifts down the timeline and loops back to the start. Data: Wikipedia (CC BY-SA 4.0)